[DESCRIPTION]: The function f(x) is selective for words related to natural phenomena, with an emphasis on geological events and concepts. Examples of words with high output values include "volcano," "tsunami," "mountain," and "geology." It appears that the function is more responsive to terms describing specific events or concepts rather than general terms like "disaster" or "event." While the function also returns values for other words, those values tend to be significantly lower than the values for its target concept(s).